Security installation

Abstract

A security installation with a portable transmitter and a receiver arranged at the object to be protected for an IR, respectively, UHF code signal which is changeable at least in part; alone the code signal of the transmitter can be changed upon random command and can be written into the associated storage device of the transmitter.

We claim: 
     
       1. A security installation, especially as door-locking or theft protection of a motor vehicle, comprising plural portable transmitter means and a receiver means for a code signal arranged at the object to be secured, said code signal being changeable at least in part, and code signal storage means in each of the plural transmitter means and receiver means, characterized in that the code signal of a first of the plural transmitter means is changeable at will upon command and is operable to be written into its associated storage means and said first of the plural transmitting means being operable upon instruction to change the code signal stored in another transmitter signal storage means to the code signal stored in said first transmitter associated storage means. 
     
     
       2. An installation according to claim 1, characterized by a switch means for giving the command for changing the code signal. 
     
     
       3. An installation according to claim 2, characterized in that the switch means activates a code signal generator means in the first transmitter means. 
     
     
       4. An installation according to claim 3, characterized in that the switch means includes at least one push button. 
     
     
       5. An installation according to claim 2, characterized in that a second switch means activates the code signal storage means in said other transmitter means for receiving the code signal transmitted by the first transmitter means. 
     
     
       6. An installation according to claim 5, characterized in that the other transmitter means includes a transmitting element which also serves simultaneously as code signal receiver for the first transmitter means. 
     
     
       7. An installation according to claim 6, characterized in that the transmitting element is a diode which transmits an IR code signal. 
     
     
       8. An installation according to claim 1, characterized in that the command is given by a removable part of the first transmitter means which is adapted to be inserted into the housing means of the other transmitter means and contains a changeable programming. 
     
     
       9. An installation according to claim 8, characterized in that the removable part is a coding rod.